Tack-pounder.



W. C. STEWART.

TACK POUNDER.

APPLICATION FILED SEPT. 17, 1909.

Patented May 17, 1910.

wrnnar c. sTnwauT, or

LYNN, Massncnusnrzrsassreuoaro 'rHos c. PLANT,

F BOBTUN, MASSACHUSETTS.

Tecn-routines.. l

pecieation of Lettera Patent. application and september rz, 1909'.serial uo. 513,184.

Patent ay mf, pppn To all lwhom it may concern:

Be it known that-l, WILLIAM C. STEWART, a subject of the King of'Greatdritaim residing at Lynn, in the countyof -Essex and State ofMassachusetts, have invented an llmprovement in Tack-Founders, of whichthe following description', in connection with the accompanyingdrawings, is a specification, like ligures on the drawings represent inglike parts. j

'llhis invention to be hereinafter described relates to machines forpounding or driving Y tacks which may project above a surface into whichthey have been previously driven.

rl`he object of this invention is to provide a machine which can beoperated over the edges of a lasted shoe, especially of the McKay type,for the purpose of removing an projections it may encounter `and tobring the sole to an even and uniform sur face. These projectionsconsist principally of the heads of tacks, used to attach the 1 upper tothe inner sole, which have not been.

drlven sufficiently or which have been driven in such irregular manneras to leave the heads thereof on an angle to the sole surface.

'llhere is shown in the aceompanyin drawj ings one of the many forms inwlnch'this invention may be embodiedand this will be described as ainvention. j

ln the drawings :-Figure 1 is a side view of a tack pounder embodyingthe present invention, the supporting column being partly broken away;Fig. 2 is a front view looking from the left of Fig. 1; Fig. 3 is yasection on the line Sal-3, Fig. 2; and Fig. 4: is an good practical formof the isometric view showing two of the plungers and'their retainingpin.

Supported on the column 1 are bearings p 3, 3, in which is a shaft 2carrying a pulley 5. A belt 4 driven by any convenient means is adaptedto drive the pulley and shaft.

Fixed to the end ofthe shaft 2, as shown, f are a number of pounderVarms 6, in this case three, but any number may be used. In 'thepreferred form of the invention these pounder arms are disposed withtheir poundmg surfaces in a helical path around the shaft. The ends ofthe arms are rounded on one side, as indicated in Fig. 2, sothat as theshaft revolves in the direction of the arrow in 2, each arm will strikea sliding blow on any plunger 7 which may be' in its path.

The plungers 7 are preferably, though not necessarily,v grouped in threerows with three plungers 1n each row, and are disposed below the pounderarms in a bearing` 8 projecting from or connected to the column4 1.Extending into the bearing Sia-re two pins 9 flattened on their innerends, as at 16, to

`pass throu h slots l1 in the plungers 7, as

shown in i s. 2, 3' and 4L, which serve to limit the motion of saidplungers, as will be readily understood.

From vthe construction thus far described it will be apparent that asthe shaft 2 rotates, the "pounder arms 6 will act upon the ytop portionofany of the plungers 7 which may be in their paths, and that therounded ends of the pounder arms cause the plun ers engaged thereby todescend, it being un erstood that the plungers in each group .act eachindependent of the other.

In order that the plungers may not rebound when they strike the pins 9under the impetus of the arms 6, there is provided means for retardingtoo free `action of the` plungers, land as one means to this end arictonal Vdevice may be caused to coact with each row of plungers, suchas three screws 12 which may be adjusted against leather ieces 13 'whichin turn bear against one ef t e plungers of agroup.` Upon the sides ofthe bearing 8 are two stop ngers 14: adjustable vertically by the screws15 in the slots 16, andagainst the lower ends of which "the sole of theshoe may at times be forced. l

-ln ,the operation of thisl machine the shoe by ythe iron plate on alast and pro` ecting to the surface of the uppter. It is pre erablydesirable that the sha 2 be driven at a high `speed to impart rapidblows to theA plungers. j

What is claimed is: 41. In a tack pounder, the combination of the vashaft, a series of pounder arms driven by said shaft, a series ofplungers, a bearing for said plungers in which they are held normallyout of the `ath of movement of the pounder arms, an means for operatingthe shaft to cause the plungers when raised by the work to pound anddepress any projection thereon and to act upon the Work about saidprojection.

2. In a tack pounder, the combination of a shaft, a seriesof pounderarms arranged thereon in different transverse planes, a plurality ofplungers arranged in planes corresponding to the planes of the pounderarms, a bearing for said plungers in which they are held normally out ofthe path of the pounder arms, and means for operatingl the shaft tocause the pounder arms to act each 'se arately on its correspondingplunger to, epress or pound any projection on the work and pound theWork about said projection when the plungers are raised by the Work.

3. In a tack pounder, the combination of a shaft, a series of pounderarms arranged thereon indifferent transverse planes, a plul path of thepounder arms, and means for o erating the shaft for causing each of thep ungers of a group to be operated by a ounder arm when the plungers areralsed y the Work to pound any projection and to act upon the Work aboutthe projection.

4; In a tack pounder, the combination of a shaft, a series of pounderarms driven by v said shaft, a series ofplungers, a bearin for saidplungers in which they are held normally out of .the path of movement ofplounder arms, retarding means acting on t e series of plungers, andmeans for operatin the shaft to .cause the plungers when ralsed by theWork to pound and depress any projection thereon and to act upon thework about said projection.

5. In a tack pounder, the combination of a shaft, a series of pounderarms driven by said shaft, a series of` plungersha bearing for saidplungers in which they are hel normally out of the path of movement ofthe pounder arms, means for operating the shaft to cause the plungerswhen raised by the work to pound and depress any projection thereon andto act upon the work about said projection, and stops projecting at eachside of the series of lungers.

6. In a tack poun er, the combination of a shaft, a series of pounderarms having curved end portions and arranged in different transverseplanes, a series of plungers each having a slot and disposed one in theplane of each of the pounder arms, a pin passing through the slots inthe plungers, and means for operating the shaft.

7. In a tack pounder, the combination of a shaft having a series ofounder arms dis osed with their poun ing surfaces helically about saidshaft, a bearing, a series of plungers in said bearing coacting witheach of said pounder arms, and means for operating the shaft to causethe series of plungers tov act upon any projection on the Work and poundthe work adjacent said projection when they are raised by the work.

`8. In a tack pounder, the combination of a shaft having a series ofounder arms disposed with their poun ing surfaces helically about saidshaft, a bearing, a series of plungers in said bearin coacting with eachof said pounder arms, rictional retarding means for said plungers, andmeans for operating the shaft to cause the series of

